iosiphone
My uncle bought a brand new iPhone 4S last week and it is suffering from an annoying problem, side b (not him) hears himself with echo. The error does not occur while
using headset or speakerphone, only when using handset.
Is there a fix for that problem?
iPhone 4S
Version 5.1
If the handset was unlocked using UltraSn0w, then you have completely removed it by updating the firmware to the latest version (Ultrasn0w only supports iOS 4.3.3). Worse yet, this has updated your baseband and that cannot be reverted even if you manage to downgrade the OS (unless you used Pwnage Tools or Sn0wbreeze as they can preserve the baseband during update). If this is indeed the case, you have now a locked phone to whatever carrier it was purchased under (AT&T) and you will have to talk to that carrier for a "hard" unlock.
To my knowledge, a "true" unlocked iPhone has no geographic limitations. As long as the network supports GSM phones (read: SIM cards), then there should be no problem.
You need to turn off "Use Cellular Data" in the "Music" section in Settings. Then, when you go to play a song from iTunes Match when you're on 3G, it'll give you a message saying you need to be on Wi-Fi.
Best Answer
I had this exact problem with a 4S until today. Here is what I did:
I installed Skype and Google Hangouts on the 4S to check whether this problem occurs with any calling application or just GSM. I made calls with Skype and Hangouts via WiFi and had no problem at all.
So I had a friend with a 4S with no such problems and I borrowed his SIM card for a test. I called his number on my 4S and had no echo problems! I put mine back and the echo returned. To make sure, I repeated this a couple of times. My SIM had echo, his no echo.
So I went to my provider's shop and requested a new SIM. Problem gone.
I hope this helps people who have tried all else with no results. Why the SIM caused this is beyond me.